These plugs are inspired by the band Coheed & Cambria's album, Year of the Black Rainbow. This chunky glitter is holographic which means it's black but also reflects rainbowy colors when it hits the light! The glitter in all of our plugs is completely encased, protected from everything. It will not flake, peel or fall off. The plugs are 316L surgical stainless steel, with domed fronts.